package com.example.dw.util;

public class StringFormulaMethods {

    public static String concat(String a, String b) {
        return a + b;
    }

    public static String upper(String str) {
        return str.toUpperCase();
    }

    public static String lower(String str) {
        return str.toLowerCase();
    }

    public static Integer length(String str) {
        return str.length();
    }

    public static String substring(String str, Integer start, Integer end) {
        return str.substring(start, end);
    }

    public static Boolean contains(String str, String search) {
        return str.contains(search);
    }
}
